Update Orbit and extra dependency p2 repo URLs to RAP 3.1

Signed-off-by: Markus Knauer <mknauer@eclipsesource.com>
diff --git a/releng/org.eclipse.rap.incubator.releng/parent/pom.xml b/releng/org.eclipse.rap.incubator.releng/parent/pom.xml
index 7bb8a31..0ce17a8 100644
--- a/releng/org.eclipse.rap.incubator.releng/parent/pom.xml
+++ b/releng/org.eclipse.rap.incubator.releng/parent/pom.xml
@@ -45,12 +45,12 @@
     <repository>
       <id>extra-dependencies-repository</id>
       <layout>p2</layout>
-      <url>http://build.eclipse.org/rt/rap/base-platforms/2.3/extra-dependencies</url>
+      <url>http://build.eclipse.org/rt/rap/base-platforms/3.1/extra-dependencies/</url>
     </repository>
     <repository>
       <id>orbit-dependencies-repository</id>
       <layout>p2</layout>
-      <url>http://download.eclipse.org/tools/orbit/downloads/drops/R20140114142710/repository</url>
+      <url>http://download.eclipse.org/tools/orbit/downloads/drops/S20151204220443/repository/</url>
     </repository>
     <repository>
       <id>fileupload-dependencies-repository</id>